Silicon Carbide tseem hu ua "carborundum"
Khoom Description
Silicon carbide muaj ob feem ntau siv ntau hom dub silicon carbide thiab ntsuab silicon carbide, ob qho tib si yog -SiC. ① Black silicon carbide muaj li ntawm 95% SiC, nws qhov toughness siab dua ntsuab silicon carbide, feem ntau yog siv rau kev ua cov ntaub ntawv uas tsis muaj zog tensile, xws li iav, ceramics, pob zeb, refractory cov ntaub ntawv, cam khwb cia hlau thiab non-ferrous hlau. Ntsuab silicon carbide muaj ntau tshaj 97% SiC, nws tus kheej-sharpening yog zoo, feem ntau yog siv rau kev ua cemented carbide, titanium alloy thiab optical iav, tab sis kuj siv rau honing lub tog raj kheej liner thiab zoo sib tsoo high-speed steel cov cuab yeej. Tsis tas li ntawd, muaj cubic silicon carbide, uas yog cov txheej txheem tshwj xeeb ntawm daj ntsuab siv lead ua, siv los ua abrade rau bearing superfinishing, tuaj yeem ua rau saum npoo roughness ntawm Ra32 ~ 0.16 microns ua rau Ra{{9 }} 04 ~ 0.02 microns.
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►Cov khoom siv ntawm silicon carbide
Silicon carbide vim muaj tshuaj lom neeg ruaj khov, siab thermal conductivity, me me thermal expansion coefficient, zoo hnav tsis kam, ntxiv rau abrasive, muaj ntau lwm yam kev siv, xws li: nrog rau cov txheej txheem tshwj xeeb rau silicon carbide hmoov coated rau sab hauv phab ntsa. lub turbine impeller lossis lub tog raj kheej lub cev, tuaj yeem txhim kho nws qhov hnav tsis kam thiab txuas ntxiv lub neej kev pabcuam 1 ~ 2 zaug; Siv los ua cov khoom siv high-grade refractory, tshav kub tsis kam, me me, lub teeb yuag thiab siab zog, zoo zog txuag cov nyhuv. Tsawg-qib silicon carbide (muaj li 85% SiC) yog ib qho zoo heev deoxidizer, uas tuaj yeem ua kom cov hlau ua kom nrawm, pab tswj cov tshuaj muaj pes tsawg leeg, thiab txhim kho cov hlau zoo. Tsis tas li ntawd, silicon carbide kuj tau siv dav hauv kev tsim hluav taws xob cua sov caij silicon carbon pas nrig.
►Cov khoom siv ntawm silicon carbide
Ntshiab silicon carbide yog cov xim tsis muaj pob tshab. Kev lag luam silicon carbide yog lub teeb daj, ntsuab, xiav thiab txawm tias dub vim yog hom thiab cov ntsiab lus ntawm impurities muaj, thiab cov pob tshab sib txawv nrog nws cov purity. Cov qauv siv lead ua silicon carbide tau muab faib ua hexagonal lossis rhombohedral -SiC thiab cubic -SiC (hu ua cubic silicon carbide). -SiC tsim ntau yam sib txawv vim qhov sib txawv sib txawv ntawm cov pa roj carbon thiab silicon atoms hauv nws cov qauv siv lead ua, thiab ntau dua 70 ntau yam tau pom. -SiC hloov mus rau -SiC ntawm 2100 degree lossis siab dua. Cov txheej txheem kev lag luam ntawm silicon carbide yog ua kom zoo nrog cov zoo quartz xuab zeb thiab roj av coke nyob rau hauv lub qhov cub tsis kam. Cov refined silicon carbide blocks yog tawg, acid-alkali ntxuav, sib nqus sib nqus thiab tshuaj ntsuam los yog dej sib cais los ua ntau yam khoom me me.
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